Hi AllThe Use OpenCL option under hardware acceleration is greyed out and there's no graphics cards listed. I know that it USED to work, so I'm unsure what's different, unless something in recent nVidia drivers changed.I have done a graphics driver update, and also uninstalled/reinstalled ASP.

I replaced the OpenCL.dll version found in folders Corel\Corel Aftershot Pro 3( 64-bit)\build and Corel\Corel Aftershot Pro 3( 64-bit)\HDR with a newer version (OpenCL64.dll) that comes with your GFX card driver you can find extracted as OpenCL.dll in the folder Windows/System32. So, just copy the new OpenCL.dll into the mentioned Corel folders. That worked for me!

Well, don't get too excited. My apologies, I'm afraid the success is just superficial. I just did some batch conversion tests with 30 raw files and I didn't notice any speed improvement with OpenCL enabled. It seems that Corel's implementation of OpenCL doesn't go well with the newer OpenCL version. It's a shame that Corel doesn't seem to care, this problem has been around for quite some time.